The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 2010
Filed:
Sep. 26, 2007
Yoshikazu Nakayama, Saitama, JP;
Yoshikazu Nakayama, Saitama, JP;
Advantest Corporation, Tokyo, JP;
Abstract
Measurement of error factors of a signal source when a connection tool is connected to a signal source whether error factors of the connection tool are known or not is enabled. There is provided an error factor measurement device including a connection tool characteristic measurement unit which measures characteristics of a connection tool based on measurement results of first and second signals, a reflection-to-output ratio measurement unit which measures the ratio relating to a measurement result of a reflection in a second (first) signal generation unit and a measurement result before the first (second) signal is reflected by a first (second) output terminal, an error factor recording unit which records respective components Eiand Eoof an error factor caused by frequency tracking of a first signal generation unit, and a product of respective components EiEoof an error factor caused by frequency tracking of a second signal generation unit, and error factor deriving unit which derive respective components of the error factor caused by the frequency tracking of the second signal generation unit based on the measurement result of the characteristics of the connection tool, the measurement result of the reflection-to-output ratio measurement unit, and the recorded contents of the error factor recording unit.